The current volume represents a translation of the section pertaining to ritual acts of worship in the Persian Tawḍīḥ al-Masāʾil (literally, Explanation of Rulings) of His Eminence Ali al-Husayni al-Sayyid al-Sistani. The text used for this translation is the thirty-first edition, published in 2014 by the Qum office of His Eminence.